\documentclass[a4paper,11pt]{article}

\usepackage{fontspec} %支持文章中字体配置
\usepackage{amsmath} %支持更多数学格式
\usepackage{xcolor,graphicx} %支持插入图片

\setlength{\hoffset}{-60pt} %左边界
\setlength{\textwidth}{480pt} %正文宽度
\setlength{\voffset}{-70pt} %上边界
\setlength{\textheight}{650pt} %正文长度

\newtheorem{definition}{定义}
\newtheorem{theorem}{定理}

% Configure zh font in {}
% use the following command to see available Chinese fonts.
% fc-list :lang=zh
\setmainfont{WenQuanYi Zen Hei}

% 中文自动换行
\XeTeXlinebreaklocale "zh"

% Main text %
\author{曹金}
\date{}

\title{}

\begin{document}

\maketitle
\tableofcontents

\section{}

% \begin{figure}
% \centering
% \includegraphics[width=1\textwidth]{/home/xls/Documents/Unix/tex/matrix_theory/linearsystem.png}
% \caption{图}
% \end{figure}

hello, world ~\cite{candes_decoding_2005}

\bibliography{../mybib}{}
\bibliographystyle{plain}

\end{document}
